[ 
https://issues.apache.org/jira/browse/YARN-3771?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14588032#comment-14588032
 ] 

Hadoop QA commented on YARN-3771:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  18m 32s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   7m 36s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 38s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 22s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   2m  8s | The applied patch generated  4 
new checkstyle issues (total was 213, now 203). |
| {color:green}+1{color} | whitespace |   0m  0s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 35s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 33s | The patch built with 
eclipse:eclipse. |
| {color:green}+1{color} | findbugs |   4m 17s | The patch does not introduce 
any new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | mapreduce tests |   0m 47s | Tests passed in 
hadoop-mapreduce-client-common. |
| {color:red}-1{color} | mapreduce tests | 109m 49s | Tests failed in 
hadoop-mapreduce-client-jobclient. |
| {color:green}+1{color} | yarn tests |   0m 36s | Tests passed in 
hadoop-yarn-api. |
| {color:green}+1{color} | yarn tests |   7m  3s | Tests passed in 
hadoop-yarn-applications-distributedshell. |
| | | 163m  8s | |
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|| Reason || Tests ||
| Failed unit tests | hadoop.mapred.TestReduceFetch |
|   | hadoop.mapred.TestReduceFetchFromPartialMem |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12737924/0001-YARN-3771.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / b039e69 |
| checkstyle |  
https://builds.apache.org/job/PreCommit-YARN-Build/8259/artifact/patchprocess/diffcheckstylehadoop-yarn-api.txt
 |
| hadoop-mapreduce-client-common test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/artifact/patchprocess/testrun_hadoop-mapreduce-client-common.txt
 |
| hadoop-mapreduce-client-jobclient test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/artifact/patchprocess/testrun_hadoop-mapreduce-client-jobclient.txt
 |
| hadoop-yarn-api test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/artifact/patchprocess/testrun_hadoop-yarn-api.txt
 |
| hadoop-yarn-applications-distributedshell test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/artifact/patchprocess/testrun_hadoop-yarn-applications-distributedshell.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/8259/console |


This message was automatically generated.

> "final" behavior is not honored for 
> YarnConfiguration.DEFAULT_YARN_APPLICATION_CLASSPATH  since it is a String[]
> ----------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3771
>                 URL: https://issues.apache.org/jira/browse/YARN-3771
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: nijel
>            Assignee: nijel
>         Attachments: 0001-YARN-3771.patch
>
>
> i was going through some find bugs rules. One issue reported in that is 
>  public static final String[] DEFAULT_YARN_APPLICATION_CLASSPATH = {
> and 
>   public static final String[] 
> DEFAULT_YARN_CROSS_PLATFORM_APPLICATION_CLASSPATH=
> is not honoring the final qualifier. The string array contents can be re 
> assigned !
> Simple test
> {code}
> public class TestClass {
>   static final String[] t = { "1", "2" };
>   public static void main(String[] args) {
>     System.out.println(12 < 10);
>     String[] t1={"u"};
> //    t = t1; // this will show compilation  error
>     t (1) = t1 (1) ; // But this works
>   }
> }
> {code}
> One option is to use Collections.unmodifiableList
> any thoughts ?



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